From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Date: Wed, 3 Jan 2007 16:21:28 +0000 (+0900)
Subject: [PATCH] x86_64: Fix dump_trace()
X-Git-Tag: v2.6.20-rc4~93
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7523c4dd9923cab748dad9b79d0165e118e3d03b;p=linux-2.6

[PATCH] x86_64: Fix dump_trace()

If caller passed the tsk, we should use it to validate a stack ptr.
Otherwise, sysrq-t and other debugging stuff doesn't work.

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/x86_64/kernel/traps.c b/arch/x86_64/kernel/traps.c
index 1d9eb6db73..09d2e8a10a 100644
--- a/arch/x86_64/kernel/traps.c
+++ b/arch/x86_64/kernel/traps.c
@@ -319,7 +319,7 @@ void dump_trace(struct task_struct *tsk, struct pt_regs *regs,
 	/*
 	 * This handles the process stack:
 	 */
-	tinfo = current_thread_info();
+	tinfo = task_thread_info(tsk);
 	HANDLE_STACK (valid_stack_ptr(tinfo, stack));
 #undef HANDLE_STACK
 	put_cpu();